Topcon RC-4, Instruction Manual

Page: 20 / 34

Basic Operation
18
Turn-round Function
The turn-round key on RC-4R is used to have the TS/IS/QS search or automatically track RC-4R (prism).
Turn-round function is useful for auto-tracking when you start working or when the auto-tracking is interrupted
by any reason.
For increasing efficiency, keep the auto-tracking status when you move to another measurement point.
1
Turn on the TS/IS/QS and execute the [External Link].
2
Turn on the RC-4R by pressing the power switch.
3
Collimate the TS/IS/QS by using the sighting collimator on the RC-4R.
4
Press the [turn-round] key on the RC-4R.
TS/IS/QS starts searching and ends in the tracking mode.
Important
•
Do not change the RC-4R direction during turn-round motions.
When the direction is changed, the detecting signal for TS/IS/QS moves and the prism
search cannot be performed correctly, causing a delay in the time required to complete
the search or preventing the search from being completed.
• At greater distances, the laser light at the edge of the emitting range (angle) will be
weaker; therefore, the RC-4R must be aimed correctly.
Note
The settings and conditions of communication are prerequisites for the communications
to take place between the TS/IS/QS and RC-4R.
Note
TS/IS/QS must be kept apart from reflecting planes such as glass and white walls. Reflected light
may prevent it from correct prism searching and from auto tracking. In this case, change the power
mode of RC-4R to the low power mode to decrease the output of laser beam. To change the power
mode, refer to “Low Power Mode of Laser Beam” on page 19.